Influence of initial heat treatment on the fatigue life of austenitic Fe-Ni alloy

• Autorzy: Ducki K. , Cieśla M.
• Języki publikacji: PL

Abstrakty

EN

Purpose: The paper addresses the problem of determining the dependence between initial heat treatment of an austenitic Fe–Ni alloy and its mechanical properties and fatigue life at room temperature. Design/methodology/approach: For the investigated Fe–Ni alloy after solution heat treatment, two variants of specimen ageing were applied for comparison, i.e. typical single-stage ageing and novel two-stage ageing. Specimens that underwent heat treatment were subjected to a static tensile test and low-cycle fatigue tests (LCF), carried out at room temperature. Findings: It has been found that, the specimens of Fe–Ni alloy after two-stage ageing are distinguished by higher strength properties with a little lower plastic properties. In a case of low-cycle fatigue tests, specimens after singlestage ageing were characterized by higher fatigue life. Lower fatigue life of the alloy after two-stage ageing can be explained by increased brittleness of material in boundary areas. Practical implications: The fatigue life results obtained in LCF conditions can be used in predicting the duration of operation of products made out of Fe–Ni alloy at room temperature. Originality/value: The significance of the applied ageing variants’ effect on the mechanical properties and fatigue life of the tested austenitic Fe–Ni alloy is shown in the paper.

Słowa kluczowe

PL

zmęczenie; stopy metaliczne; modyfikacja termiczna; struktura

EN

fatigue; metallic alloys; heat treatment; structure

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 29, nr 2
• Strony: 89--92
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Ducki K.

autor

Cieśla M.

• Materials Science Department, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland,

Bibliografia

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